package com.wali.common.ccp.execl;

import com.google.common.collect.Lists;
import com.wali.common.ccp.exception.CcpException;
import com.wali.common.ccp.execl.annotation.CcpExcelField;
import com.wali.common.ccp.execl.common.CcpExcelReflections;
import com.wali.common.enums.ErrorCodeEnum;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.List;

/**
 * @author wali
 * @ClassName CcpExcelUtils
 * @Description excel导入工具类
 * @email wali.xu@kpmg.com
 * @date 26/09/2018 11:21 上午
 */
public class CcpExcelUtils {

    private static Logger log = LoggerFactory.getLogger(CcpExcelUtils.class);

    /**
     * 工作薄对象
     */
    private Workbook wb;

    /**
     * 工作表对象
     */
    private Sheet sheet;

    /**
     * 标题行号
     */
    private int headerNum;

    /**
     * @param file       导入文件对象
     * @param headerNum  标题行号，数据行号=标题行号+1
     * @param sheetIndex 工作表编号
     * @return
     * @throws
     * @Title CcpExcelUtils
     * @Description 构造函数
     */
    public CcpExcelUtils(File file, int headerNum, int sheetIndex) throws FileNotFoundException, CcpException {
        this(file.getName(), new FileInputStream(file), headerNum, sheetIndex);
    }

    /**
     * @param multipartFile 导入文件对象
     * @param headerNum     标题行号，数据行号=标题行号+1
     * @param sheetIndex    工作表编号
     * @return
     * @throws
     * @Title CcpExcelUtils
     * @Description 构造函数
     */
    public CcpExcelUtils(MultipartFile multipartFile, int headerNum, int sheetIndex)
            throws CcpException, IOException {
        this(multipartFile.getOriginalFilename(), multipartFile.getInputStream(), headerNum, sheetIndex);
    }

    /**
     * @param fileName   导入文件名
     * @param is         文件流
     * @param headerNum  标题行号，数据行号=标题行号+1
     * @param sheetIndex 工作表编号
     * @return
     * @throws
     * @Title
     * @Description 构造函数
     */
    public CcpExcelUtils(String fileName, InputStream is, int headerNum, int sheetIndex)
            throws CcpException {
        try {
            if (StringUtils.isBlank(fileName)) {
                throw new CcpException(ErrorCodeEnum.ERROR_EXCEL_FILE_NULL);
            } else if (fileName.toLowerCase().endsWith("xls")) {
                this.wb = new HSSFWorkbook(is);
            } else if (fileName.toLowerCase().endsWith("xlsx")) {
                this.wb = new XSSFWorkbook(is);
            } else {
                throw new CcpException(ErrorCodeEnum.ERROR_EXCEL_FILE_ILLEGAL);
            }
            if (this.wb.getNumberOfSheets() < sheetIndex) {
                throw new CcpException(ErrorCodeEnum.ERROR_EXCEL_SHEET_NOT_EXISTS);
            }
            this.sheet = this.wb.getSheetAt(sheetIndex);
            this.headerNum = headerNum;
            log.debug("Initialize success.");
        } catch (Exception e) {
            throw new CcpException(ErrorCodeEnum.ERROR_INTERNAL_CODE);
        }
    }

    /**
     * @param rownum
     * @return
     * @throws
     * @Title
     * @Description 获取行对象
     */
    public Row getRow(int rownum) {
        return this.sheet.getRow(rownum);
    }

    /**
     * @param
     * @return
     * @throws
     * @Title getDataRowNum
     * @Description 获取数据行号
     */
    public int getDataRowNum() {
        return headerNum + 1;
    }

    /**
     * @param
     * @return
     * @throws
     * @Title getLastDataRowNum
     * @Description 获取最后一个数据行号
     */
    public int getLastDataRowNum() {
        return this.sheet.getLastRowNum() + headerNum + 1;
    }

    /**
     * @param
     * @return
     * @throws
     * @Title getLastCellNum
     * @Description 获取最后一个列号
     */
    public int getLastCellNum() {
        return this.getRow(headerNum).getLastCellNum();
    }

    /**
     * @param row    获取的行
     * @param column 获取单元格列号
     * @return
     * @throws
     * @Title getCellValue
     * @Description 获取单元格值
     */
    public Object getCellValue(Row row, int column) {
        Object val = "";
        try {
            Cell cell = row.getCell(column);
            if (cell != null) {
                if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
                    val = cell.getNumericCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
                    val = cell.getStringCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
                    val = cell.getCellFormula();
                } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
                    val = cell.getBooleanCellValue();
                } else if (cell.getCellType() == Cell.CELL_TYPE_ERROR) {
                    val = cell.getErrorCellValue();
                }
            }
        } catch (Exception e) {
            return val;
        }
        return val;
    }


    /**
     * @param cls    导入对象类型
     * @param groups 导入分组
     * @return
     * @throws
     * @Title getDataList
     * @Description 获取导入数据列表
     */
    public <E> List<E> getDataList(Class<E> cls, int... groups)
            throws InstantiationException, IllegalAccessException {
        List<Object[]> annotationList = Lists.newArrayList();
        // Get annotation field
        Field[] fs = cls.getDeclaredFields();
        for (Field f : fs) {
            CcpExcelField ef = f.getAnnotation(CcpExcelField.class);
            if (ef != null && (ef.type() == 0 || ef.type() == 2)) {
                if (groups != null && groups.length > 0) {
                    boolean inGroup = false;
                    for (int g : groups) {
                        if (inGroup) {
                            break;
                        }
                        for (int efg : ef.groups()) {
                            if (g == efg) {
                                inGroup = true;
                                annotationList.add(new Object[]{ef, f});
                                break;
                            }
                        }
                    }
                } else {
                    annotationList.add(new Object[]{ef, f});
                }
            }
        }
        // Get annotation method
        Method[] ms = cls.getDeclaredMethods();
        for (Method m : ms) {
            CcpExcelField ef = m.getAnnotation(CcpExcelField.class);
            if (ef != null && (ef.type() == 0 || ef.type() == 2)) {
                if (groups != null && groups.length > 0) {
                    boolean inGroup = false;
                    for (int g : groups) {
                        if (inGroup) {
                            break;
                        }
                        for (int efg : ef.groups()) {
                            if (g == efg) {
                                inGroup = true;
                                annotationList.add(new Object[]{ef, m});
                                break;
                            }
                        }
                    }
                } else {
                    annotationList.add(new Object[]{ef, m});
                }
            }
        }
        // Field sorting
        Collections.sort(annotationList, new Comparator<Object[]>() {
            public int compare(Object[] o1, Object[] o2) {
                return new Integer(((CcpExcelField) o1[0]).sort()).compareTo(new Integer(((CcpExcelField) o2[0]).sort()));
            }

            ;
        });

        List<E> dataList = Lists.newArrayList();
        for (int i = this.getDataRowNum(); i <= this.getLastDataRowNum(); i++) {
            E e = (E) cls.newInstance();
            int column = 0;
            Row row = this.getRow(i);
            StringBuilder sb = new StringBuilder();
            for (Object[] os : annotationList) {
                Object val = this.getCellValue(row, column++);
                if (val != null) {
                    CcpExcelField ef = (CcpExcelField) os[0];
                    // Get param type and type cast
                    Class<?> valType = Class.class;
                    if (os[1] instanceof Field) {
                        valType = ((Field) os[1]).getType();
                    } else if (os[1] instanceof Method) {
                        Method method = ((Method) os[1]);
                        if ("get".equals(method.getName().substring(0, 3))) {
                            valType = method.getReturnType();
                        } else if ("set".equals(method.getName().substring(0, 3))) {
                            valType = ((Method) os[1]).getParameterTypes()[0];
                        }
                    }

                    try {
                        if (valType == String.class) {
                            String s = String.valueOf(val.toString());
                            if (StringUtils.endsWith(s, ".0")) {
                                val = StringUtils.substringBefore(s, ".0");
                            } else {
                                val = String.valueOf(val.toString());
                            }
                        } else if (valType == Integer.class) {
                            val = Double.valueOf(val.toString()).intValue();
                        } else if (valType == Long.class) {
                            val = Double.valueOf(val.toString()).longValue();
                        } else if (valType == Double.class) {
                            val = Double.valueOf(val.toString());
                        } else if (valType == Float.class) {
                            val = Float.valueOf(val.toString());
                        } else if (valType == Date.class) {
                            val = DateUtil.getJavaDate((Double) val);
                        } else {
                            if (ef.fieldType() != Class.class) {
                                val = ef.fieldType().getMethod("getValue", String.class).invoke(null, val.toString());
                            } else {
                                val =
                                        Class.forName(this.getClass()
                                                .getName()
                                                .replaceAll(this.getClass().getSimpleName(),
                                                        "fieldtype." + valType.getSimpleName() + "Type"))
                                                .getMethod("getValue", String.class)
                                                .invoke(null, val.toString());
                            }
                        }
                    } catch (Exception ex) {
                        log.info("Get cell value [" + i + "," + column + "] error: " + ex.toString());
                        val = null;
                    }
                    // set entity value
                    if (os[1] instanceof Field) {
                        CcpExcelReflections.invokeSetter(e, ((Field) os[1]).getName(), val);
                    } else if (os[1] instanceof Method) {
                        String mthodName = ((Method) os[1]).getName();
                        if ("get".equals(mthodName.substring(0, 3))) {
                            mthodName = "set" + StringUtils.substringAfter(mthodName, "get");
                        }
                        CcpExcelReflections.invokeMethod(e, mthodName, new Class[]{valType}, new Object[]{val});
                    }
                }
                sb.append(val + ", ");
            }
            dataList.add(e);
            log.info("Read success: [" + i + "] " + sb.toString());
        }
        return dataList;
    }

    public static void main(String[] args) {
        try {
            String path = "C://" +File.separator + "Users" + File.separator + "walixu" + File.separator + "Desktop" + File.separator + "123.xlsx";
            File file = new File(path);
//            CcpExcelUtils ccpExcelUtils = new CcpExcelUtils(file, 0, 1);
//            List<Area> dataList = ccpExcelUtils.getDataList(Area.class);
//            log.info(dataList.size() + "");
//
//            Iterator<Area> iterator = dataList.iterator();
//            while (iterator.hasNext()) {
//                Area next = iterator.next();
//
//                if(next.getCode().endsWith("0000")) {
//                    next.setParentCode("CN");
//                } else{
//                    next.setParentCode(next.getCode().substring(0, 2) + "0000");
//                }
//            }
//
//            Iterator<Area> iterator2 = dataList.iterator();
//            while (iterator2.hasNext()) {
//                log.debug(iterator2.next().toString());
//            }
//
//            CcpExcelUtils ccpExcelUtils2 = new CcpExcelUtils(file, 0, 0);
//            List<Area> dataList2 = ccpExcelUtils2.getDataList(Area.class);
//            log.info(dataList2.size() + "");
//
//            Iterator<Area> iterator3 = dataList2.iterator();
//            while (iterator3.hasNext()) {
//                Area next = iterator3.next();
//
//                if(next.getCode().endsWith("0000")) {
//                    next.setParentCode("CN");
//                } else{
//                    if(next.getName().endsWith("00")) {
//                        next.setParentCode(next.getCode().substring(0, 2) + "0000");
//                    } else{
//                        next.setParentCode(next.getCode().substring(0, 4) + "00");
//                    }
//                }
//            }
//
//            Iterator<Area> iterator4 = dataList2.iterator();
//            while (iterator4.hasNext()) {
//                log.debug(iterator4.next().toString());
//            }

        } catch(Exception e){
            log.error(e.getMessage(), e);
        }
    }
}
